Which of the following compounds represent $2,4-dimethyl-3-pentanone$?

• A.
• B.
• C.
• D.

Answer: (D)

Verified step by step guidance

1. Identify the parent chain: The name '2,4-dimethyl-3-pentanone' indicates that the parent chain is a pentanone, which means it is a five-carbon chain with a ketone group.
2. Locate the ketone group: The '3-pentanone' part of the name specifies that the ketone group (C=O) is on the third carbon of the chain.
3. Identify the methyl groups: The '2,4-dimethyl' part of the name indicates that there are methyl groups (CH₃) attached to the second and fourth carbons of the parent chain.
4. Analyze the structures: Examine each provided structure to see which one has a five-carbon chain with a ketone group on the third carbon and methyl groups on the second and fourth carbons.
5. Select the correct structure: Choose the structure that matches the description of 2,4-dimethyl-3-pentanone, ensuring the positions of the ketone and methyl groups are correct.